Blowpipe.



E. DDAM. BLOWPIPB.

948,043, APPLICATION FILED OGT.8, 1907. 14

2 SHEETS-SHEET 1.

E. ODAM.

BLOWPIPE.

APPLICATION FILED ooms, 1907. 943 O43 Patented Dee. 14, 1909` y 2sHBBTssHEET 2.

INVENTQR @www WITNESSES:

urr. sans TENT FFKQE.

EUGENE ODAM, OF PARIS, FRANCE, ASSIGNOR T0 SOCIETE DES APPLCATIONS DELACTYLNE, OF PARIS, FRANCE.

Specification of Letters Patent.

BLOWPIPE.

Application led Gctober 8, 1907. Serial No. 396,432.

T o all whom it may concern: Be it known that I, EUGENE ODAM, a citizenof the Republic of France, residing in Paris, France, have inventedcertain new aud useful Improvements in Blowpipes, of which the followingis a specification.

This blowpipe uses the vapor of mineral essences or other liquid fueland oxygen or air as comburant, the combustible vapor and the comburantgas mixing inside the blowpipe so as to form a combustible gaseousmixture which on leaving'the nozzle burns in the form of an intense andexceedingly hot flame capable of fusing and welding.

metals. This blowpipe may utilize the vapors of all liquid fuels such asethers,-alco hols, petrol, benzin and the like.

The liquid lwhichis to be converted mto combustible vapor is supplieddirectly to the blow ipe and it isin the appliance itself that thisiquid is converted into vapor, which vapor is utilized not only forfurnishing the jet of gas which is to combine with the oxygen andform-the combustible gaseous mixture but also for supplying a burner theheat of which vaporizes the liquid fuel. Accordingly, `this blowpipe isdifferentiated from those heretofore known in that only one combustiblefluid is supplied to the apparatus and this fluid itself forms the vaporwhich is to serve for the vaporization of the said fluid at the sametime that this fluid is burning in the blowpipe. Several differentarrangements of the blow ipe in accordance with this invention arelllustrated by way of example in the accompanying drawing, in whichFigure 1 isan external elevation of the blowpipe. Fig. 2 is a crosssection onrthe line M M of Fig. l. Fig. 3 is a vertical longitudinalsection on the axis of the body of the blowpipe. Fig. 4 is an externalelevation.

partly in section of a modiiied form of the blowpipe. Fig. 5 isasectional elevation of another form. Fig. 6 is an elevation,-partly insection, of the blow-pipe with the subproper and extending parallel withthis blowpipe body throughout almost its entire length; it is in thischamber D that the vaporization of the mineral essence takes place underthe influence of the heat liberated by the Bunsen burner E.

The chamber D, which is closed at one extremity by a screw plug (L bymeans of Which it is possible when desired to clean the said chamber,terminates in an annular reserve chamber F which surrounds the centraltube or nozzle G of the blowpipe. The vapor of the mineral essencegenerated in the chamber D, the vaporization being completed ifnecessary in the chamber F, finds two discharge orifices in this latterchamber: one opens on the passage H descending as .far as the Bunsenburner E and which furnishes the essence vapor required for theoperationA of this burner; the supply of essence to the Bunsen burnerisalso regulated by means of a pin cock b. The other discharge orifice'forthe vapor from the chamber` F is the conduit o which opens into theannular space d surrounding the oxygen supply nozzle e, as hereinafterexplained.

.As stated, the oxygen enters through the pipe C which bends and opensat m at the rear extremity of the blowpipe; the screw plug f enables theblowpi e to be cleaned if necessary; the nozzle e t rough which theoxygen issues is itself screwed into the rear fitting K of the blowpipeand this nozzle may be unscrewed for inspecting the interior of theblowpipe and cleaning it if necessary. i

rIhe annular space d receiving the essence vapor with which the blowpipeis to be supplied,'communicates through the conduit L with the casingz'-of a pin cock j; this pin j closes more o r less the orifice throughwhich the conduit" v71,.- opens into the casing z'. Accordingly, asalready explained, it is possible to regulate the admission of theessence vapor to the Bun'sen burner and to the blowpipe at will andaccordin to requirements. i' The extreme nose o of the blow ipe isscrewed on to the head of the blowpipe and it may be exchanged accordingto require-A vand the essence vapor mingle intimately and traveltogetherl along the passage G, and

finally a homogeneous combustible gaseous mixture leaves the extremity oof the. blowpipe in the form of an intense flame.

In order to start the blowpipe, it is only necessary to connect theessence supply pipe B with the reservoir under pressure which containsthis liquid and the oxygen conduit so that the heat liberatedby itlproduces the vaporization of the said liquid; at the end of a shorttime the apparatus will operate regularly. Its action may also bestarted by providing around the Bunsen burner a cup IG for the receptionof a small quantity of alcohol or other readily inflammable productwhich is kindled'in order to heat the Bunsen burner and give rise to aspeedy liberation oi' vapor enabling the Bunsen burner to begin to act.

In the modification represented in Figs.` 4 and 5, the vapor-izationofthe mineral essencer or other liquid Which is supplied through thepipe B is effected in a heating chamber in the form of a coil I arrangedabove the Bunsen burner. The upper extremity of this coil is able tocommunicate directly With the annular space surrounding the oxygendischarge nozzle or with a chamber surrounding the blowpipe tube ornozzle, such as the chamber F of Fig. 5, or

again it may end in a tube J, Fig. 4, coiled helically around the blowipe tube G'. The vaporization of the liqui is completed in this helicaltube J acting also as a reserve chamber and the vapor Which hastraversed its convolutions becomes distributed at its other extremity,on the one hand in the conduit I-I Which ends at the Bunsen burner andon the other hand in the conduit c, which ends at the casing of the pincock z', which is itself connected, as already explained, With theannular space d Which surrounds the nozzle e for the admission of theoxygen.

'Ihe arrangement of the apparatus as a Whole is shown in Fig. 6.v Theoxygen supply-pipe C passes to a tank 2 containing a supply of oxygen,and the liquid `supplypipe B passes to a vessel 3 in Which air pressureis maintained by any suitable means such as the pump 4.' In the airspace above y the liquid in the tank 3 the pressure P is approximatelythe same as the 4pressure P in the mixing chamber F in the head of theburner. This equilibrium of pressures is an important feature of theinvention, producing an automatic regulation of the feed of the liquid.It is understood that in the beginning the air in the receptacle 3'carrying the liquid exerts a certain pressure upon the liquid andcauses the latter to ascend through the tube B to the vaporizinf chamberD and annular chamber F in the head of the blow-pipe. The liquid remainsthroughout its passage up to the chamber D at the temperature of thesurrounding atmosphere substantially. When it enters the vaporizingchamber the vapor is formed and a reserve accumulates Which producesacounter-pressure against the air pressure P in the receptacle 3. Thetension of the combustible vapor increases with the temperature of thehead of the blow-pipe until equilibrium of pressures is established.From this point the pressure remains stationary whatever may be the temerature and the nature of the combustible liquid. The pressure in thevapor cannot increase above that in the receptacle. This eifect insuresthe regular operation ofthe blow-pipe With combustible liquids havingvery different vaporizing points (such, for example, as ordinary ethervaporizing at 35 degrees C. and refined petroleum at 280 degrees 0.).

What I claim and desire to secure by Letters Patent ofthe United Statesis 1. A blow-pipe forV fusin and `Welding metals, utilizing the vapor oa combustible liquid and oxygen or air as a comburant, i11- cluding incombination a supply pipe B for l the liquid, an annular reserve chamberadapted to carry a certain reserve of vapor of a combustible liquid soas to maintain an approximately constant pressure, and thus to insure aregular floW,`an auxiliaryv heating 'chamber communicating Withsaidannular chamber, and a Bunsen burner acting directly upon said heatingchamber to heat the same, the said tube, annular reserve chamber andheating chamber constituting together a single compact device With theparts firmly connected t0 each other.

2. A blow-pipe for fusing and Welding metals, utilizing the vapor of acombustible liquid and oxygen or air as a comburant, including incombination a supply pipe B for the liquid, an annular reserve chamberadapted to carry a certain reserve of vapor of a combustible liquid so.as to maintain an approximately constant pressure, and thus to insure aregular flow, an auxiliary heating chamber consisting of a coil I, and aBunsen burner acting directly upon said heating chamber to heat thesame,the said tube, annular-reserve chamber and heating chamberconstituting together a single com-l pact device with the parts firmlyconnected to each other.

3. A lblow-pipe for fusin metals, utilizing a vapor o a combustibleliquid with oxygen or air as a comburant, including in combination in asingle body, a central tube or blow-pipe proper, an annular and Weldingreserve chamberfor the vapor, and an auxila tube c through which theannular reserve chamber Ncommunicates with the central tube,a smallreservoir z' between said tubular member c and said central tube, and aneedle valve j controlling the passage of gasfrom said tubular member cto said small reservoir z', said reservoir being directly incommunication with said central tube through an opening k.

4. A' blow-pipe for fusing and welding metals, utilizing a vapor of acombustible liquid with oxygen or air as a comburant, includingin'combination in a single body a central tube or blow-pipe proper, anannular reserve chamber for the Vapor, and an auxiliary heating chamber,consisting of a coiled pipe, a Bunsen burner arranged to heat saidheating chamber directly, a tube c through which the annular reservechamber communicates with the central tube, a small reservoir 'i betweensaid tubular member c and said central tube, and a needle Valve jcontrolling the passage of gas from said tubular member c to said smallreservoir z', said res'- ervoir being directly in communication withsai-d central tube through an opening h.

5. A blow-pipe for fusing and welding metals, utilizing a vapor of acombustible liquid with oxygen or air as a comburant,

including ink combination in a single body a central tube or blow-pipeproper, an annular reserve chamber for the vapor, an auxiliary heatingchamber, and a reservoir containing the combustible liquid underpressure` of compressed air, in communication with said heating andannular reserve chambers, whereby the operationv is continuous under thebalanced pressures of the annular reserve chamber and the reservoircontaining the combustible liquid.

(i. A blow-pipe for fusing and welding metals, utilizing a vapor of acombustible liquid with oxygen or air as a comburant, including incombination in a single body a central tube or blow-pipe proper, anannular reserve chamber for the vapor, an auxiliary heating chamber inthe form of a coiled pipe, and a reservoir containing the combustibleliquid under pressure of compressed air in communication with saidheating and annular reserve chambers, whereby the operation iscontinuous under the balanced pressures of the annular reserve chamberand the reservoir containing the combustible liquid.

ln witness whereof I have hereunto signed my name this 25th day ofSeptember 1907, in the presence of two subscribing witnesses.

EUGENE ODAM. Witnesses:

DEAN B. MAsoN, GABRIEL BELLIARE.

